Determine the number of lines of symmetry for each figure.

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?

What is the equation of a line that passes through points (0, 4) and (-4,-8)?

Is experimental probibilty the same as the observed frequency in math? i need the answer asap!